#include<stdio.h>

int Sum(int a,int b)
{
  int sum=0;
  int i=a;
for(;i<=b;i++)
{
  sum+=i;
}
return sum;
}

int main()
{
 int i=1;
 int j=100;
printf("%d",Sum(i,j));
  return 0;

}
